flutter-go/packages/flutter_web/test/material/card_theme_test.dart

// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter_web/material.dart';
import 'package:flutter_web/rendering.dart';
import 'package:flutter_web_test/flutter_web_test.dart';

void main() {
  test('CardTheme copyWith, ==, hashCode basics', () {
    expect(const CardTheme(), const CardTheme().copyWith());
    expect(const CardTheme().hashCode, const CardTheme().copyWith().hashCode);
  });

  testWidgets('Passing no CardTheme returns defaults',
      (WidgetTester tester) async {
    await tester.pumpWidget(const MaterialApp(
      home: Scaffold(body: Card()),
    ));

    final Container container = _getCardContainer(tester);
    final Material material = _getCardMaterial(tester);

    expect(material.clipBehavior, Clip.none);
    expect(material.color, Colors.white);
    expect(material.elevation, 1.0);
    expect(container.margin, const EdgeInsets.all(4.0));
    expect(
        material.shape,
        const RoundedRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(4.0)),
        ));
  });

  testWidgets('Card uses values from CardTheme', (WidgetTester tester) async {
    final CardTheme cardTheme = _cardTheme();

    await tester.pumpWidget(MaterialApp(
      theme: ThemeData(cardTheme: cardTheme),
      home: const Scaffold(body: Card()),
    ));

    final Container container = _getCardContainer(tester);
    final Material material = _getCardMaterial(tester);

    expect(material.clipBehavior, cardTheme.clipBehavior);
    expect(material.color, cardTheme.color);
    expect(material.elevation, cardTheme.elevation);
    expect(container.margin, cardTheme.margin);
    expect(material.shape, cardTheme.shape);
  });

  testWidgets('Card widget properties take priority over theme',
      (WidgetTester tester) async {
    const Clip clip = Clip.hardEdge;
    const Color color = Colors.orange;
    const double elevation = 7.0;
    const EdgeInsets margin = EdgeInsets.all(3.0);
    const ShapeBorder shape = RoundedRectangleBorder(
      borderRadius: BorderRadius.all(Radius.circular(9.0)),
    );

    await tester.pumpWidget(MaterialApp(
      theme: _themeData().copyWith(cardTheme: _cardTheme()),
      home: const Scaffold(
          body: Card(
        clipBehavior: clip,
        color: color,
        elevation: elevation,
        margin: margin,
        shape: shape,
      )),
    ));

    final Container container = _getCardContainer(tester);
    final Material material = _getCardMaterial(tester);

    expect(material.clipBehavior, clip);
    expect(material.color, color);
    expect(material.elevation, elevation);
    expect(container.margin, margin);
    expect(material.shape, shape);
  });

  testWidgets('CardTheme properties take priority over ThemeData properties',
      (WidgetTester tester) async {
    final CardTheme cardTheme = _cardTheme();
    final ThemeData themeData = _themeData().copyWith(cardTheme: cardTheme);

    await tester.pumpWidget(MaterialApp(
      theme: themeData,
      home: const Scaffold(body: Card()),
    ));

    final Material material = _getCardMaterial(tester);
    expect(material.color, cardTheme.color);
  });

  testWidgets('ThemeData properties are used when no CardTheme is set',
      (WidgetTester tester) async {
    final ThemeData themeData = _themeData();

    await tester.pumpWidget(MaterialApp(
      theme: themeData,
      home: const Scaffold(body: Card()),
    ));

    final Material material = _getCardMaterial(tester);
    expect(material.color, themeData.cardColor);
  });

  testWidgets('CardTheme customizes shape', (WidgetTester tester) async {
    const CardTheme cardTheme = CardTheme(
      color: Colors.white,
      shape: BeveledRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(7))),
      elevation: 1.0,
    );

    final Key painterKey = UniqueKey();

    await tester.pumpWidget(MaterialApp(
      theme: ThemeData(cardTheme: cardTheme),
      home: Scaffold(
          body: RepaintBoundary(
              key: painterKey,
              child: Center(
                  child: Card(
                child: SizedBox.fromSize(
                  size: const Size(200, 300),
                ),
              )))),
    ));

    // TODO(butterfly_web): Add golden files support.
//    await expectLater(
//      find.byKey(painterKey),
//      matchesGoldenFile('card_theme.custom_shape.png'),
//      skip: !Platform.isLinux,
//    );
  });
}

CardTheme _cardTheme() {
  return const CardTheme(
      clipBehavior: Clip.antiAlias,
      color: Colors.green,
      elevation: 6.0,
      margin: EdgeInsets.all(7.0),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.all(Radius.circular(5.0)),
      ));
}

ThemeData _themeData() {
  return ThemeData(
    cardColor: Colors.pink,
  );
}

Material _getCardMaterial(WidgetTester tester) {
  return tester.widget<Material>(
    find.descendant(
      of: find.byType(Card),
      matching: find.byType(Material),
    ),
  );
}

Container _getCardContainer(WidgetTester tester) {
  return tester.widget<Container>(
    find.descendant(
      of: find.byType(Card),
      matching: find.byType(Container),
    ),
  );
}